I think any society that has thrived has had some variation of this cultural trait. Its easy to see why: without lots of children the society would simply die out.
This is a very nuanced point though. As a young, somewhat single developer, I'm incredibly grateful to work a job that I enjoy that pays great. Love the freedom to go on vacation anywhere, to afford nice restaurants and such. I can't see why I would give up all that freedom to "settle down" as my parents keep reminding me of. Although I've had many great relationships, at some point, its always: "I just want to not have to plan out every weekend together!".
Perhaps I'm an outlier that just puts way too much emphasis on independence.
